How should data be transmitted when using the HTTP GET method?

When using the HTTP GET method, data is transmitted via the URL as query parameters. This means that data is added after the question mark (?) in the URL in the format key=value, and multiple parameters are separated by an ampersand (&). For example:

http://example.com/api/resource?param1=value1&param2=value2

It is important to remember that GET requests are intended for retrieving data and should not modify the server's state. Also, the amount of data is limited by the URL length, so for transmitting large volumes of data, other methods such as POST should be used.