A special grand jury investigating corruption in the General Services Administration indicted two individuals and a computer firm yesterday for allegedly participating in a kickback scheme that raised the price of GSA data processing contracts.

The grand jury, meeting in U.S. District Court in Alexandria, charged that Peter C. Loux, a former employe of Computer Sciences Corp., a large computer firm based in Los Angeles, recived $35,400 in kickbacks over the course of a year from Icarus Corp., a Rockville computer firm, and its president, Herbert G. Blecker of Potomac.

In return, the grand jury charged, Loux "steered" subcontracts to Icarus under a contract awarded by GSA to Computer Sciences.

In addition, the indictment alleged, Loux knowingly permitted Blecker and Icarus to drfraud GSA by falsifying the job resumes of Icarus employes used as consultants by the federal housekeeping agency.

The indictment did not state the amount that GSA allegedly lost through the scheme. A GSA internal audit report has said GSA paid Computer Sciences and Icarus $300,000 for the services of consultants based on qualifications they did not have.

Barnet Skolnik, Loux's lawyer, said yesterday, "Mr Loux is innocent, and we will prove it in court."

Ira Wolpert, the lawyer for Icarus and Blecker, said that while he has not yet seen the indictment, "We believe the grand jury has been presented with only those facts selected by the government, and when all the facts are fully presented, Icarus Corp. and Mr. Blecker will be conclusively exonerated."

The 37-count indictment was the result of a year-long investigation by the Justice Department's task force on GSA corruption, headed by William S. Lynch. It was announced yesterday by Attorney General Benjamin R. Civiletti.

The main contract at issue in the indictment was awarded in 1972 by GSA to Computer Sciences to provide the government with a system that allows 7,500 government offices to make use of data stored in central computers. The system is known as Infonet.

Since that time, GSA has paid Computer Sciences some $100 million under the terms of the contract.

According to the indictment, Loux, who now lives in Denver, conspired with Blecker and Icarus to steer subcontracts to Icarus in return for payments made to Loux through a "shell" corporation.

The indictment says Loux, Blecker, and Icarus knowingly presented false bills to GSA, since the rates charged for the consulting services of certain Icarus employes were based on "false resumes."

The three defendants were charged with violating statutes dealing with conspiracy, kickbacks, mail fraud and filing false claims with the government.

Paul D. Scanlon, president of Data Processing and Technical Consultants Inc., which was named in the indictment as the "shell" company used for funneling kickbacks to Loux, was named as an unindicted coconspirator. He allegedly received 10 percent of the payoff money.

The investigation began after GSA auditors and investigators found that the consultants paid for by GSA did not have the qualifications claimed for them. The information was turned over to the Justice Department, which assigned FBI agents to conduct the probe that led to the indictment.