Pete Bonventre, Emmy Award-winning producer of Howard Cosell's "SportsBeat" weekend show on ABC the past three years, has signed as senior producer in charge of planning and special projects for "CBS Morning News" . . . He starts Monday . . .

The Cosell show, considered by many critics to have been the best sports journalism broadcast of recent years, left the network last month, due to poor ratings and Cosell's bad-mouthing of his bosses at ABC Sports . . .

Nominations for the Golden Globe Awards announced yesterday included 22 for NBC, 19 for CBS, 15 for ABC and 2 for PBS . . .

The awards will be presented by the Hollywood Foreign Press Association on Jan. 24 . . .

Among the TV nominations, Joan Collins of "Dynasty" and Angela Lansbury of "Murder, She Wrote" were named for best actress in a dramatic series . . .

"Cagney & Lacey," "Dynasty," "Miami Vice," "Murder, She Wrote" and "St. Elsewhere" were nominated for best dramatic TV series . . . while "The Cosby Show," "Family Ties," "The Golden Girls," "Kate & Allie" and "Moonlighting" were nominated for best musical or comedy TV series . . .

Best mini-series or film made-for-TV nominations included "Amos," "Death of a Salesman," "Do You Remember Love?" "An Early Frost" and "The Jewel in the Crown" . . .

Maryland Public Television has withdrawn the "America Tonight" news-show project from the current PBS program auction because of a lack of corporate underwriting . . .

The half-hour weeknight program, which was to have been coproduced with the New Jersey Network, had sought $1 million from PBS stations and $6 million from corporate underwriters . . .

The project was originally billed as an affordable counter to the one-hour "MacNeil/Lehrer NewsHour" and producers had announced grandiose plans to hire "name" commercial network anchors and to set up a nationwide satellite news-feed system for the series, originally scheduled to debut in midsummer . . .

The January edition of NBC's "American Almanac" will air at 10 p.m. on Monday, the 27th. Meanwhile, national figures are in for the December edition thereof . . . an 8.8 Nielsen rating and a 15 percent audience share . . .

That performance this past Monday night, coupled with the absence of Monday night football on ABC, helped CBS to one of its best Monday nights of the year . . .

Capital Cities Communications Inc. and ABC Inc. today will announce that their $3.5 billion merger has been completed, three days ahead of schedule. Effective today, the new name for the communications giant -- Capital Cities/ABC Inc. -- will be registered with state officials in Albany, N.Y. Won't affect the ABC on-the-air programming logo, however . . . Also in the News

Overnight ratings figures for the New Year's Day bowl games from Nielsen's 12 major markets show NBC's Rose Bowl coverage first with a 20.0 rating and a 34 percent audience share, followed by the Orange Bowl on NBC at 19.7/31; NBC's Fiesta Bowl at 12.5/25; CBS' Cotton Bowl, 12.1/24; and ABC's Sugar Bowl, 5.2/18 . . .

The Peach Bowl on CBS Tuesday afternoon did a 5.3/13 . . .

In development for CBS Entertainment: a movie called "Hawaii Five-0 Revisited." Jack Lord returns as Steve McGarrett but no word on Danno (James MacArthur). We sure hope they book him, too . . .

One of the guests on the final broadcast today of the canceled "America" syndicated show (Channel 7 at 4 p.m.) will be 5-year-old Nick Speed, a radio reporter-engineer for Pyramid Communications here, a nonprofit media network operated by and for young people ages 4 to 25 . . .

Little Nick, by the way, was booked on the magazine show by former Carter White House aide Midge Constanza, who says that as of this afternoon she will be looking for another job in the media . . .

Talent coordinator/segment producer Constanza signed with Paramount TV last summer with the understanding that "America" would use her talents to sign major politicos for appearances. But, she said yesterday, "The concept changed." She did produce some segments, however, during the four-month life of the magazine . . . Constanza said she also foresees lots of campaigning for Democrats and liberal causes out in California in the months to come . . . Gunn Remembered

Hartford N. Gunn Jr., who served six years as the first president of the Public Broadcasting Service, died yesterday in Boston . . .

Mr. Gunn, 59, had been suffering from cancer . . .

He had been president and general manager of WGBH in Boston when he was chosen to lead PBS in 1970. In 1977 he was elected vice chairman of the PBS board. Later he became senior vice president of KCET in Los Angeles and joined the Satellite Television Corp., a subsidiary of COMSAT, in 1982. He was vice president, program development for that firm when he was stricken last October . . .

Yesterday, PBS President Bruce Christensen said, "We all miss his brilliance, his industry and his capacity to require from each of us the best we could give" . . .

Peter Fannon, president of the National Association of Public Television Stations, an entity created by Mr. Gunn as part of a public broadcasting industry restructuring he recommended, said, "Hartford was a brilliant man, able to envision what public broadcasting could and should contribute to our country, and he dedicated his life to bringing it about" . . .

As founder of PBS, Mr. Gunn was instrumental in bringing together the disparate educational broadcasting and regional public networks in 1969 that eventually formed the nationwide "interconnection" . . .

A memorial service has been scheduled at Old South Church in Boston on Monday. A service of remembrance will be scheduled later this month in Washington . . .

Channel 7 has named Mark Poertner program operations coordinator, effective Monday. He had been a writer-producer at the station . . .

Channel 4 announced that effective Jan. 20, "The New Newlywed Game" will move from 9 a.m. weekdays to 7:30 p.m., replacing "The Price Is Right," which moves to 1:30 a.m., replacing "Love Connection," which takes over the 9 a.m. time slot . . . And Finally

USA Network announces that the Feb. 11 edition of "The Dick Cavett Show" will be preempted by the Westminster Dog Show . . .