What are the gun laws like where you are from? 
In america here it depends on the state just like other countries! Some countries have restrictive firearm policies, and some have relaxed gun policies. America basically mirrors that sentiment based on the state!
Which state has the strictest gun laws?
I can't tell you that specifically but i can tell you of roughly 2.5 million deaths total in the US in 2013, only ~1.3% were related to guns! 
How many mass shootings are there a year? 
Between 1967 and 2017 there were roughly 146 mass shootings. If you average that over roughly 50 years if my math is correct that would be like 3 a year however the number has increased recently so its more like there were less back then and more and more as of recently.
How many people constitute a mass shooting? 
Many places tend to have a different definition, but the US congressional research service they define it as when four or more people selected randomly not including the person who is committing the murder is killed. This echoes the FBI definition of mass murder.
Sounds like stronger gun control is needed. 
Yes as even though the gun laws vary by country, most of them have restrictive firearm policy. Only a few legislations are categorized as permissive.