The main GF1-window consists of several sections.
At the top you have the menu-bar and at the bottom you have buttons which differ depending on what you are doing. In the middle you can see from left to right:
The player-name with a red background shows whose turn it is.
If you set tturn it is.
If you set the "show position names"-option in the setup-window, then you will see the position-name of the position you are over appear if you stay over the same place on the gameboard for 1/2 a second.
The pieces for playing GIPF are shown on the board as white (really light yellow) and black discs. Gipf pieces (2 normal pieces on top of each other) have an extra gray circle on them.