The notes of the scale or mode in question are: G A B-flat D E F. Does this combination of notes have a name?
With just a B♭ ( other notes all naturals), the parent key will be the major one with that one flat. That's key F. Since your scale/mode starts on the second note of the F major scale, and incorporates all the same notes, it is called the G Dorian.
Each of the modes has exactly the same note pattern - TTSTTTS, just starting at a different point in that sequence. Dorian starts on the 2nd T, so that pattern is TSTTTST.
Just noticed there's no C note. Most diatonic scales have 7 - one letter name for each note. This answer is dependent on there being a C. No C = no named scale!
Except:- Raga Manavi (many thanks to @Mac), a hexatonic scale (hence no P4 interval from root). Is there any set of notes which doesn't have a name..?
That would be the G Dorian Mode, a mode consisting of the steps
W H W W W H W.