Textures When Porting Models

So, I’m attempting to port a model to gmod for use as a prop from Aliens: Colonial Marines. I ported the .py mesh, however, unlike other file extensions like .fbx or .obj it seems to not have the texture assigned to it automatically in Blender:

However, in Umodel it shows this:

I know this isn’t a Blender forum, and I apologize if I’m breaking any rules by asking about this, but I didn’t see anything regarding Blender in the rules. Does anyone know what to do about this? I assume I don’t have to unwrap it again and align the texture myself, but I could be completely wrong. Thank you so much in advance!