You know, even not every German camp during WW2 was a concentration camp.
Nice to see you posting facts rather than personal material (or at least trying to). You're right about the Nazis. As well as the Konzentrationslager they also had transit camps, labour camps, POW camps, camps for rehabilitation and re-education of Poles, hostage camps and extermination camps. However, with the exception of some of the extermination camps (which had an the sole purpose of killing, i.e. the Aktion Reinhard camps), all of those non-Konzentrationslager fit the generally accepted definition of concentration camp.
Did those alleged ‘polish’ camps after the war had gas chambers?
No they did not. But as mentioned above, gas chambers are more the kind of thing that would be found in the extermination camps in Poland. The Nazi extermination camps in Poland which, I must stress, were never Polish.
You can argue about semantics if you want to but to most people a concentration camp which is run by Poles, guarded by Poles, managed by Poles and exists at the order of a Polish government which is made up of Poles is simply a Polish concentration camp.