As we all know, Gunther from the coffee house (Central Perk) had a huge crush on Rachel. It was shown in the series very often. He'd do anything for her, and he has a big soft spot for her.
Although it was shown on screen for viewers, was there any indication that Rachel knew about his crush? I think maybe she had some idea that Gunther liked her, but it was never indicated (as far as I see it) that she knew about his crush.
Did Rachel or any other from friends group ever know about Gunther's crush on Rachel?