(Updates at market close)

* TSX ends up 0.1% at 34,856.99

* Gains 6.4% in the second quarter

* Canada's GDP rises 0.5% in April

* Tech adds 0.9%, financials gain 0.8%

By Fergal Smith

June 30 (Reuters) - Canada's main stock index slightly added

to its quarterly gain on Tuesday, as financial and technology

shares rose and after domestic data showed the economy expanding

faster than expected in April.

The Toronto Stock Exchange's S&P/TSX Composite Index

ended up 33.17 points, or 0.1%, at 34,856.99.

For the second quarter, the index was up 6.4%, marking its

eighth straight quarterly advance, the longest such stretch

since 1996. Still, it lagged the 14.9% gain for the S&P 500

, the U.S. benchmark.

* "The Canadian market, for the most part, has been largely

earnings driven," said Angelo Kourkafas, senior global

investment strategist at Edward Jones Investments.

* "It has lagged U.S. and some other indices because of its

commodities tilt. But markets are ready to enter a new quarter

from a solid footing."

* Financials, health care and

technology led the TSX's quarterly advance, while the

materials group, which includes metal mining shares,

and energy posted declines.

* Canada's gross domestic product increased 0.5% in April

from March, marking the largest monthly expansion in nine months

and allaying concerns that a tariff-led slowdown in the economy

was getting more entrenched.

* The U.S. was expected to formally declare on Wednesday

that it will not extend the U.S.-Mexico-Canada Agreement on

trade, starting a decade-long clock to wind down the 32-year-old

North American free trade zone as the three countries haggle

over proposed changes.

* Technology rose 0.9% on Tuesday, led by a gain of 6.2% for

the shares of electronic equipment company Celestica Inc ( CLS )

.

* Heavily weighted financials added 0.8%, while the

materials group was up 0.6% as copper prices rose.

* The price of oil settled 1.8% lower at $69.50 a

barrel and has given up nearly all of its advance since the

start of the U.S.-Iran war at the end of February.

* Energy dipped 0.2% and consumer staples ended

1.1% lower.

* The TSX is set to be closed on Wednesday for Canada Day.