For discusing fpGUI as a separate toolkit unrelated to Lazarus please use the fpGUI appropriate forum/newsgroup/etc. This is a Lazarus forum.
NO!!
Nobody here (thank God) objects asking FPC related questions. So, we should finally agree that this is
not Lazarus only forum, as FPC and Lazarus are closely related and all FPC topics must be welcomed in this forum. FpGui is a GUI framework completely written in FPC and as such must be welcomed here.
Anyway, fpGui is closely related to Lazarus project for two reasons - first, because fpGui's Visual Form Designer can be very well and comfortably used with Lazarus GUI, and second - because fpGui is (at least as partially implemented LCL-fpGui) a LCL target. Perhaps your Custom drawn controls already are million times better LCL target than fpGui, but try to accept that they are not the only solution. Just try to get over it.