Lorenzo,
What a unique question 😃
I have both ports. Sorry to say though I have no idea whether the lenses are interchangeable - if indeed that is your question - but I do know a sure way to find out: send an e-mail to Gates. I'm sure they will tell you what you need to know.
Let me guess there may be a problem if the lenses can be swapped. If you look at the illustration you provided above, the dome port clearly moves the lens farther away from the camera lens than either of the other two ports. I'd guess that even if you could put the SP34A lens on the GP34A port, some vignetting may occur with the SP34A lens if the camera is zoomed full wide.
Gates does say the lenses are field replaceable so maybe you could try it?
Hope this helps,
Tom