Here is the original TE curve for the GG1 as released by Railworks / Dovetail:
<?xml version="1.0" encoding="utf-8"?>
<cCSVArray xmlns:d="http://www.kuju.com/TnT/2003/Delta" d:version="1.0" d:id="1632468">
<CSVItem>
<cCSVItem d:id="68319960">
<X d:type="sFloat32" d:alt_encoding="0000000000000000" d:precision="string">0.000000</X>
<Y d:type="sFloat32" d:alt_encoding="0000000000005940" d:precision="string">100.000000</Y>
<Name d:type="cDeltaString"></Name>
</cCSVItem>
<cCSVItem d:id="68319972">
<X d:type="sFloat32" d:alt_encoding="0000000000001440" d:precision="string">5.000000</X>
<Y d:type="sFloat32" d:alt_encoding="0000000000707240" d:precision="string">295.000000</Y>
<Name d:type="cDeltaString"></Name>
</cCSVItem>
<cCSVItem d:id="68319984">
<X d:type="sFloat32" d:alt_encoding="0000000000005940" d:precision="string">100.000000</X>
<Y d:type="sFloat32" d:alt_encoding="0000000000C07240" d:precision="string">300.000000</Y>
<Name d:type="cDeltaString"></Name>
</cCSVItem>
<cCSVItem d:id="68319996">
<X d:type="sFloat32" d:alt_encoding="0000000000406040" d:precision="string">130.000000</X>
<Y d:type="sFloat32" d:alt_encoding="000000000000F03F" d:precision="string">1.000000</Y>
<Name d:type="cDeltaString"></Name>
</cCSVItem>
</CSVItem>
</cCSVArray>