Meaning trap
get on
have a good relationship
to have a friendly or harmonious relationship with someone; to interact well and without conflict.

Don't mix these meanings
Same phrase, different job.
to have a friendly or harmonious relationship with someone; to interact well and without conflict.
'get on' also has the more basic meaning 'board transport'; this is the advanced sense.
Hear it in context
Notice where the phrase sounds natural.
I don't really get on with my neighbours, but we remain polite.
In the workplace, being able to get on with colleagues is often considered as important as technical skills.
Fix the pattern
One small grammar move makes it sound right.
Not: Do you get on good with your boss?
Say: Do you get on well with your boss?
Use 'get on WELL' (adverb), not 'good'; and 'get on WITH someone'.
Which sounds natural?
Tap the one a native speaker would say.
'Get on' (BrE) is how people describe an easy relationship; 'amicable relationship' is HR/legal.
Build natural chunks
Words that usually travel with it.
get on (well) with
- with everyone
- well
- like a house on fire
- fine
Don't confuse it
Related
Other meanings and phrases to compare.
- get on (board transport) — 'get on' also has the more basic meaning 'board transport'; this is the advanced sense.