Can I become a canadian citizen?

I’ve looked into this. It’s not that easy. you have to be able to offer up something, a skill, a business plan, something to offer the citenzry, even on a small scale. You have to fill out an aplication….which, I believe you can get on line

http://www.cic.gc.ca/english/information/applications/adults.asp

“This application is for permanent residents 18 years of age or older who wish to apply for Canadian citizenship. They must have lived in Canada for at least three of the four years preceding the application, be able to communicate in English and/or French, and demonstrate some knowledge of Canada and the rights and responsibilities of citizenship. Persons with a criminal record, facing criminal charges or subject to immigration enforcement action may be ineligible for citizenship.”

You can read the eligibility requirements on this portion of their site

http://www.cic.gc.ca/english/citizenship/become.asp

You are eligible for citizenship as a grandchild of a Canadian citizen grandparent only if your parent was a Canadian citizen (although not necessarily born there). If your parent was not also a citizen, you would need to apply the same way as anyone else (as explained by damianmann above)
http://www.cic.gc.ca/english/about/citizenship/bornout-info.asp

I am canadian resident from March 11, 2005 and I have been out of Canada during 60 days in the last three years. My question is: When can I apply for the canadian citizien ?