Since most of the Geth technology is derived from the Quarians, then they are probably compatible to a degree. It wouldn't be that difficult for a clever or desperate Quarian to repurpose some scavenged Geth material and tech to patch up their suit in a pinch.
Another idea is that it's actually a Quarian design in origin. As the Quarians were interacting with the Council long before they created the Geth, then their environment suits must been created first and Tali suggests that the suits have become iconic for her people. Perhaps this was true even before their exile, so when they Quarians created the Geth in their image, they naturally made the Geth to resemble a suited Quarian?
Conversely, the design is something the Geth intentionally added to themselves, in order to more resemble their Creators. They may have done so either out of veneration or respect? Or perhaps even as a means to reach out to the Quarians (something Legion suggests they've tried repeatedly), trying to invoke the concept of "a form you are more comfortable with" by better emulating their Creators?