Source: NASA With what was learned from Gemini 7/6a, four of the five remaining missions were able to rendezvous with and physically dock to their GATV — the one exception was Gemini 9a ...

Though Gemini 7 was primarily an orbiting medical laboratory ... and of nearby Gemini 6 during rendezvous—a rendezvous, one official noted in passing, that brought the capsules within a foot ...