GTUtilities won't compile on OS X 10.01

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Checkout Revision 416
2. Open GTL.xcodeproj
3. Hit Product -> Build

What is the expected output? What do you see instead?

Build GTL Framework. Compile error

What version of the product are you using? On what operating system?

Revision 416. OS X 10.10

Please provide any additional information below.

Error : The error is 
/Users/bruno/Dev/lib/Objective-C/google-api-objectivec-client-read-only/Source/U
tilities/GTLUtilities.m:252:24: 'NSGarbageCollector' is deprecated: first 
deprecated in OS X 10.10 - Building Garbage Collected apps is no longer 
supported.

Original issue reported on code.google.com by [email protected] on 15 Oct 2014 at 10:37

[GoogleCodeExporter]

As a temporary workaround, you can set the deployment target to 10.9 and it 
will compile and run. We may wish to do that until this issue can be 
permanently addressed.

Original comment by [email protected] on 23 Oct 2014 at 5:50