Hello,
I would like to know if there is gadgets for hostgroup, I downloaded and installed the gadgets available on the web site of Nagvis and no gadget doesn't work and or it say "ERROR : the needed parameter "perfdata" is missing. ",
Do you have an idea ? 
no gadget doesn't work
Which gadget and what happens?
it say "ERROR : the needed parameter "perfdata" is missing. ",
We are talking about Icinga2 and NagVis?
I talk about all gadget "std_... .php" in .../nagvis/share/userfiles/gadgets/ and the gadgets available on the Nagvis website : http://exchange.nagvis.org/exchange/Gadgets/
I talk about Nagvis 
I talk about Nagvis
And I'd like to know which monitoring core you're using, respectively which connection to the monitoring core you configured.
Did you take a look at the documentation?
Yes but they do not talk about gadget with a hostgroup
QuoteGadgets are only supported for service objects.
Ok thank you 
