Waiting for GTK3 like nothing else. Pray to God about one...
Praying God does not help now, providing code to implement it would help.
If you really wanted this, you would dive into the code, learn and improve it. Clearly you don't want it badly enough.
GTK3 is indeed a very important priority. GTK3 used not one year. Without GTK3 Lazarus loses its appeal for most Linux developers.
That was from your earlier message.
Sure in future GTK3 will be more important than GTK2, just like GTK1 was replaced by GTK2.
Still, it is not a "
very important priority", it is only one widgetset among many others. The desktop Linux already has LCL-QT which is well maintained. Other Linux based gadgets like Android require a CustomDrawn widgetset. I think CustomDrawn should be the highest priority now.
When GTK3 finally replaces GTK2, I believe somebody will have enough motivation to complete LCL-GTK3. It has not happened yet.