If my gf go with guy for dinner only is ok for me.
Certain things i will ask to determine if i'm ok or not.
Group outings are ok for me.
1. Going alone with 1 guy? is he a colleague? Neighbour? Good friend she knew long ago? Or new friend???
2. Any other friends joining?
3. What other activities besides dinner?
Going overseas alone with another guy is definitely is NO for me. 99% of such cases usually end up with sex. Based on my own experience bringing a girl overseas is 100% ended up with sex.