I got the mail just now but I cannot link my application at all. Anyone could help me with it? Thanks.
Are you asking to link your application to gckey if it is i search on this furom this:
1 STEPS for linking PR application (Assuming you have UCI number for the Principal Applicant)
Step 1: After you click on "Link a paper application" form
Tell us about the application
Category: Permanent Residence
Sub-Category: Family Class (Spouses)
Please select one: Application Number & Unique Client Identifier (UCI)
Application Number: Enter Application number from the AOR email.
Unique Client Identifier (UCI): Enter Principal Applicants UCI (
IMP: NOT Sponsors UCI. PA's UCI. AOR email has Sponsors UCI)
Applicant's personal information
Please Select one: Passport - Enter Principal Applicants passport details (add exact details as on Principal Applicants passport)
Other Application Information
Province: (add the same information you wrote on question 5 of form IMM0008)
City: (add the same information you wrote on question 5 of form IMM0008)
Marital Status: Married (Of course

)
Number of family members included in this application: 2 (1 Sponsor + 1 Principal Applicant) Add 1 more for every dependent
Step 2:
Then click on "Search for my Application"
After the application is found, click on "Link Application"
Tada!
#2 STEPS for linking Spousal open work permit (SOWP) application
Step 1: After you click on "Link a paper application" form
Tell us about the application
Category: Temporary Residence
Sub-Category: Work Permit Extension
Please select one: Unique Client Identifier (UCI) & Family Name
Unique Client Identifier (UCI): Enter Principal Applicants UCI (
IMP: NOT Sponsors UCI. PA's UCI. AOR email has Sponsors UCI)
Application Number: Enter Principal Applicants Family name as it is from the passport
Applicant's personal information
Please Select one: Passport - Enter Principal Applicants passport details (add exact details as on Principal Applicants passport)