Guitar scoring is divided into different systems and institutions, so the specific series will vary from system to institution. The following are several common guitar grading systems and their range:

1. Yamaha guitar grading system: * * * There are 8 levels, from entry level (1 level) to professional level (level 8).

2.RGT (Guitar Instructor Registration Office) Guitar Grading System: * * There are 10 levels, from elementary level to performer's diploma.

3.ABRSM guitar grading system: * * There are 8 grades from elementary to diploma.

4. Trinity College Guitar Grading System in London: * * There are 8 levels, from elementary to recital diploma.

It should be noted that the levels and requirements of each grading system may be different. If there are specific grading requirements, it is recommended to refer to the corresponding official grading guide to understand the specific grading and examination requirements.