Gilmore didn't support abortion in the first three months of pregnancy, he was just conceding that as Governor he couldn't single-handedly overturn Roe v. Wade. He supported the strongest possible laws he could enact.
Pat Robertson was one of the guy's biggest contributors for crying out loud.
http://www.aei.org/publications/pubID.8275/pub_detail.asp
"Gilmore acknowledged that the Supreme Court has held abortion to be legal under the Constitution, and, as governor, he could not change that. By accepting the status quo, he defused concerns that he might threaten abortion rights. Almost half of those who voted for Gilmore said they wanted abortion kept legal. They voted for him for other reasons, like his opposition to Virginia's highly unpopular personal property tax on automobiles, which Gilmore made the core issue in his campaign."
go visit www.draftgilmore.org - Gilmore is a staunch pro-lifer.