In the inter-county contest to capture bigger and better businesses, Montgomery County yesterday collected another trophy.

The information and computer services division of General Electric said it plans to build a $100 million campus-like headquarters on 212 acres in Montgomery County. General Electric Imformation Services Co. has occupied offices in Rockville since 1964 and decided to stay in the county, basically because its 1,000 employes live in or around the county, a company spokesman said.

"A couple other companies will be announcing" their intentions to move to the county "in the next few days," according to Gary Cuddeback, the county's economic development specialist.

A spokeman for the computer division said the company has "been searching for the right site" in Montgomery County for more than a year and Cuddeback and other Montgomery county officials yesterday were basking in their conquest over neighboring jurisdictions.

"A couple of companies that have been looking here have been attracted from Fairfax County," Montgomery county's biggest competitor, Cuddeback said.

Montgomery County this year launched a $100,000 campaign to attract business, but it is small compared with the $700,000 economic development budget of Fairfax County.

However, Montgomery County's new economic development thrust only affected the General Electric deal "indirectly," Cuddeback said.

"The GEISCO people were going to expand anyway. They had approached the county about finding a place."

The computer division plans to locate on the vacant William O. Johnston tract located on the south side of Quince Orchard Road just west of the National Bureau of Standards building in Gaithersburg. However, the Johnston property is zoned for residential use and a hearing, as yet unscheduled, must be held first, a company spokesman said.

According to Donald S. Bates, chairman of the board and president of the General Electric subsidiary, the master plan for the development is being prepared. The company plans to build low rise buildings containing more than 5,000 square feet of office space "in a campus-like setting," he said.

If the rezoning is approved, the company plans to occupy its new headquarters by late 1982, a spokesman said.

GEISCO is one of Montgomery County's largest employers.