First play today didnt understand the GS movement with terrain

By chikago666, in Death Angel

Hello people, got this game on the morning and played after lunch (losing beautifully). And I got a question that I couldnt find on the forum:

When the GS spawn on a terrain on the left, for example a corridor, the GS is currently ON the terrain (being engaged with the SM on the right) or in the LEFT side of the terrain (staying 1 movement from being engaged with the SM)?

Thats because if they are IN the terrain, they are auto-engaged with the SM, so, they cannot move, BUT if they arent, in the GS phase they stay out of range (because the symbol dont match to move) OR the move to front (engaging the SM)?

Thanks for the answers

Well, I guess I figured it out. When a GS is engaged wih a SM it still can move, so the GS is IN the terrain tile.